Use this as a warm-up:
Take a favorite classic from your shelf. Open the book to a random spot. Read through a scene and then re-read it aloud. What do you notice about the author's cadence?
Next, copy out the same scene long-hand. How does the scene look in your own script? What more do you notice about the writing?
Write a scene on a topic inspired by the scene you selected. Pay particular attention to the craft elements you noticed in the classic you chose.
Begin your own writing session.